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Booztd 3

How To: Mating an RB25 and Z32 Trans

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Booztd 3    14
Nope - although if you have a choice, go for the NA tranny as there is less chance of it having the crap beaten out of it.

 

Correct

 

The only difference in the NA and TT Z32 bell housings are the inner diameter, since you're using an RB bell housing, this is negligible.

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HowlerMonkey    12

Sweet sweet sweet!!

 

As clean as that cuda machine is, I'll venture a guess you are surely not at a toyota dealership or that thing would be a skanky mess.

 

That RB tranny sure looks a lot like the implementation used in the pathfinders and Z31 turbo from late 1987 on.

 

Of course........they are rare and the Z32 tranny is not.

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Careless    217

05/87+ Z cars are FS5R30A transmissions.

all relatively identical to RB25 transmission, save for a few different lengths of the input shaft and different gear ratios.

 

All will receive any bell-housing with the proper interior plate seal from what I've learned here.

 

It's all starting to make my Z31 feel like a better RB30DE candidate. :?

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Just to clairify as I'm a little fuzzy on two things.

 

If i use a Z32 trans with an RB bellhousing in a 240Z will I run into shifter troubles or will it all line up the same as if I was using a RB25 trans?

I ask because one person said they would have to modify there shifter area if using the RB trans and another said the trannys were the same minus the bellhousings, so I'm confused.

 

Also this is for all Z32 trannys, correct? I noticed someone specify JDM Z32 trans, so I was wondering if the USDM ones were the same or not.

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Booztd 3    14

Im not sure how the shifter setup works in the 240's however the RB25 shifter setup is definitely different than the Z32 shifter setup (this is accomplished by different linkages and tail section)

 

The reference I made to the trans being the same internally, was meant to concern the actual gears, ratios, synchros, shift forks, etc

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The FS5R30A was used in the z31 turbo from 5/87 until the end. Used again in the Z32 both n/a and TT. Also was used in all 5spd skylines (r32-r34). The differences are shifter position, input shaft total length, individual gear ratios and if GTR (yes, same transmission) the addition of tail section to apply AWD. That is why all the bell housing are interchangable.

 

Personally I used the 87 turbo transmission (swap going into 87 z31) and the 1/8th inch offset was not an issue. Along with that, the shifter position after final mounting was still in near stock position where as if using the z32 transmission I would have had to modify the tunnel so the shifter would be reachable.

 

But then another option I have heard of is using the R34 GTR bell housing attached to the 6spd Getreg transmission from MK4 Supra TT. Can any vouch for this being correct? I know the MK4 used the V160 or V161 (Getreg 233) but what did the R34 use?

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